Sealing ring for jars



May 26, 1925 1,539,222

M. L. TURNER SEALING RING FOR JARS Fil ed March so, 1923 I Patented May 26, 1925.

Toallwhomz'tmwy I 1 1,539,222 PATENT orrlce.

MARTHA I: TURNER, OF WEST ROXBURY, MASSACHUSETTS.

SEALING RING ron mas.

Application filed March 30, 1823. Serial No. 628,825.

concern:- 3

Be it known that I, MARTHA L. TURNER, a citizen of the United States,'and resident of West Roxbury, county of Suffolk, Commonwealth of Massachusetts, have invented an Improvement in Sealing Rings-for Jars, of which the following description, in connection with the accompanying drawings, is

a specification, like characters on the drawings representing like parts in each of the several views.

This invention relates to rubber or like resilient sealing rings. as commonly employed on glass jars for sealing and reserving fruits, vegetables and like foo stufi's.

A principal object of the invention is to provide such a sealing. ring with means whereby the vacuum within thejar may be quickly and easily relievedso that the jar cover maybe removed-without requlrlng to be pried off or otherwise forcibly removed. -To this end the invention consists in the prothe ring periphery whereby on.pulling this vision of the rubber sealing ring with a tab or projection at one point thereon and of relatively narrow extent at the locality of tab outward, a relatively restricted area of the ring is stretched and thus reduced in thickness sufliciently to permit the ingress of air to relieve the vacuum in the jar. The fore oing and other objects and advantages of t e 'invention'will more fully appear from the following detailed description taken in connection with the accompanying drawings, and the distinctive features of novelty will be pointed out in the appended claims.

Referring to the drawings:

Fig. 1 is an elevation'showing the sealing ring embodying-my invention in one form thereof; 7

Fig. 2 is an edge view thereof;

Fig. 3 is a plan view of a jar equipped with the invention and illustrating the operation of breaking the seal; and

Fig. 4 is an elevation showing a slightly modified form.

10 indicates a sealing ring which'may be generally of usual type adapted to be applied to the top of a jar 11, with the cover 12 resting thereon and suitably secured in In accordance with my invention the sealing ring is provided with a tab or projection 13 at one point-on the periphery thereof. This tab has a relatively narrow in the hole 13.

neck portion 13 extendingfrom the periphery of the ring and bearinga relatively enlarged head 13 which constitutes a finger piece or gripping portion. This head may if desired be provided also with a hole 13. to receive a hook or bar for pulling outward on the tab. In use when it 1s desired to relieve the vacuum in the jar to permit removal .of the c0ver,the tab 13 is pulled outward either bytaking hold of the finger piece head 13 or by insertinga suitable tool This results in stretching the ring at the locality of the neck ortion 13, thus reducing the thickness of t e ring at this point and permitting the ingress of air is indlcated at X. For this result to be accomplished satisfactorily and easily, it is essential that the neck portion 13 of the tab be relatively narrow, so that the stretching action upon the ring is localized and confined to a relatively small extent thereof; it Wlll be understood that if this were not the case and the tab or projection were oined with the ring in a relatively wide base portion, the stretching action instead of being localized as described would be spread and dlsslpated over a considerable angular extent of the ring, making it much more difficult, if not impossible to stretch the rlng so as to reduce its thickness appreclably or enough to permit the necessary ingross of air. In Figure 4 I show a slightly modlfied form where the head 130 constitutmg the finger iece instead of being located symmetrical y on the narrow neck 13, extends wholly at one side thereof. The action in this case is precisely the same as already described, -the only difference being a matter of preference or convenience in takin hold of the tab to obtain the necessary 11] thereon. It is .to be particularly unerstood that my invention does not contemplate the provision of the described tab for use in prying or pullin off the cover forcibly, but instead is limited to thede scribed construction and provision-whereby a strictly localized stretch of the ring at a tributes thereof, and I therefore desire the present embodiment to be considered in all respects as illustrative and not restrictive,

reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

Having described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A resilient sealing ring for jars having a tab projecting from the periphery thereof in a relatively narrow neck portion bearin a relatively enlarged head constituting a ger grip, whereby a tension exerted upon said narrow neck portion results in stretching and reducing the thickness of a relatively small, closely localized area of the ring to permit venting at such area.

2. A' rubber or like sealing ring for jars having a tab projecting therefrom in a relatively narrow neck portion where it-joins the ring, and with a relatively enlarged head having an aperture therein and constitutin means for pulling the tab straight outwar whereby a tenslon exerted upon said narrow neck ortion results in stretching and reducing t e thickness of a relatively small, closely localized area of the ring to permit venting at such area.

In testimony whereof, I have signed my 30 name to this specification.

MARTHA L. TURNER. 

